What are the x ' s for in stetson beaver hats?

Indicates the percentage of beaver fur is contained in the hats. See: http://www.stetsonhat.com/raw/faq.asp#WhatdotheXsmean What are the percentages of beaver in our hats? The percentage of beaver is determined by the X quality of the product. The higher the X's the higher percentage of beaver fur is mixed in the hat. Because of our efforts to remain the leading manufacturer in headwear, the exact percentages are a manufacturing secret formula that we choose not to share.